Codebook Design for Close-Loop Wireless System Based on Distribution of Vector
Xiong Lei · Journal of Beijing Jiaotong University · 2009
In close-loop wireless communication systems,when the transmitter obtains the instant channel information by a feedback link from the receiver,benefits of improving performance for wireless system can be realized.The key point for feedback used in close-loop wireless system is optimal which can achieve better performance with certain feedback complexity.Analysis on this issue is presented in this paper.And a limited based on distribution of is proposed.Principle and algorithms of this are detailed.Consequently performance comparison on these codebooks is done.Simulation results show that the comparing to current codebooks,the proposed vector distribution based codebook can obtain lower error rate for wireless transmission and higher capacity,enhancing performance of wireless system by 1～2 dB.